2801806461 has 6 divisors (see below), whose sum is σ = 4047053790. Its totient is φ = 1867870968.

The previous prime is 2801806453. The next prime is 2801806487. The reversal of 2801806461 is 1646081082.

2801806461 is a `hidden beast` number, since 2 + 8 + 0 + 1 + 8 + 0 + 646 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1631756025 + 1170050436 = 40395^2 + 34206^2 .

It is not a de Polignac number, because 2801806461 - 2³ = 2801806453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2801806451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155655906 + ... + 155655923.

It is an arithmetic number, because the mean of its divisors is an integer number (674508965).

Almost surely, 2^2801806461 is an apocalyptic number.

It is an amenable number.

2801806461 is a deficient number, since it is larger than the sum of its proper divisors (1245247329).

2801806461 is a wasteful number, since it uses less digits than its factorization.

2801806461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311311835 (or 311311832 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 2801806461 is about 52932.0929210248. The cubic root of 2801806461 is about 1409.7627924488.

The spelling of 2801806461 in words is "two billion, eight hundred one million, eight hundred six thousand, four hundred sixty-one".